Question

Tính nhanh:2 x 17 x 12 + 4 x 6 x 21 + 8 x 3 x 62

Answer 1

2 x 17 x 12 + 4 x 6 x 21 + 8 x 3 x 62

= 24 x 17 + 24 x 21 + 24 x 62

= 24 x (17 + 21 + 62)

= 24 x 100

= 2400

Answer 2

  2 x 17 x 12 +  4 x 6  x 21 + 8 x 3 x 62

= 2 x 12  x 17 + 24 x 21 + 24 x 62 

= 24 x 17 +  24  x 21 + 24x 62

= 24 x ( 17 + 21 + 62)

= 24 x 100 

= 2400

Answer 3

2 x 17 x 12 +  4 x 6  x 21 + 8 x 3 x 62

= 2 x 12  x 17 + 24 x 21 + 24 x 62 

= 24 x 17 +  24  x 21 + 24x 62

= 24 x ( 17 + 21 + 62)

= 24 x 100 

= 2400